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Version 7.0: WinUI

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Clemens 2021-11-17 23:17:11 +01:00
parent 448f599d96
commit 9f61b90795
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MapControl/WinUI/MapPanel.WinUI.cs Normal file
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// XAML Map Control - https://github.com/ClemensFischer/XAML-Map-Control
// © 2021 Clemens Fischer
// Licensed under the Microsoft Public License (Ms-PL)
#if WINUI
using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Media;
#else
using Windows.UI.Xaml;
using Windows.UI.Xaml.Media;
#endif
namespace MapControl
{
public partial class MapPanel
{
public static readonly DependencyProperty LocationProperty = DependencyProperty.RegisterAttached(
"Location", typeof(Location), typeof(MapPanel),
new PropertyMetadata(null, (o, e) => (((FrameworkElement)o).Parent as MapPanel)?.InvalidateArrange()));
public static readonly DependencyProperty BoundingBoxProperty = DependencyProperty.RegisterAttached(
"BoundingBox", typeof(BoundingBox), typeof(MapPanel),
new PropertyMetadata(null, (o, e) => (((FrameworkElement)o).Parent as MapPanel)?.InvalidateArrange()));
public static readonly DependencyProperty ParentMapProperty = DependencyProperty.RegisterAttached(
"ParentMap", typeof(MapBase), typeof(MapPanel), new PropertyMetadata(null, ParentMapPropertyChanged));
private static readonly DependencyProperty ViewPositionProperty = DependencyProperty.RegisterAttached(
"ViewPosition", typeof(Point?), typeof(MapPanel), new PropertyMetadata(null));
public MapPanel()
{
InitMapElement(this);
}
public static void InitMapElement(FrameworkElement element)
{
if (element is MapBase)
{
element.SetValue(ParentMapProperty, element);
}
else
{
// Workaround for missing property value inheritance.
// Loaded and Unloaded handlers set and clear the ParentMap property value.
element.Loaded += (s, e) => GetParentMap(element);
element.Unloaded += (s, e) => element.ClearValue(ParentMapProperty);
}
}
public static MapBase GetParentMap(FrameworkElement element)
{
var parentMap = (MapBase)element.GetValue(ParentMapProperty);
if (parentMap == null && (parentMap = FindParentMap(element)) != null)
{
element.SetValue(ParentMapProperty, parentMap);
}
return parentMap;
}
private static MapBase FindParentMap(FrameworkElement element)
{
return VisualTreeHelper.GetParent(element) is FrameworkElement parent
? ((parent as MapBase) ?? (MapBase)element.GetValue(ParentMapProperty) ?? FindParentMap(parent))
: null;
}
private static void SetViewPosition(FrameworkElement element, Point? viewPosition)
{
element.SetValue(ViewPositionProperty, viewPosition);
}
}
}